Eardley, C. and Griswold, T. (2017) “Taxonomic revision of the Afrotropical species of Pachyanthidium Friese (Hymenoptera: Megachilidae: Anthidiini)”, Zootaxa. Auckland, New Zealand, 4237(3), pp. 401–453. doi: 10.11646/zootaxa.4237.3.1.